JP2016140199A - Coupling holding member and integrated type unit coupling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling holding member and an integrated unit coupling structure, which is used for an integrated unit to which a control unit and a controlled device are electrically connected, and suppresses the damage of a connector and a contact failure.SOLUTION: An inserting and pulling-out bolt 60b is used for a hybrid vehicle driving unit 100 that a unit side generator connector 61, a unit side motor connector 62, and a case side connector 50 are engaged, and a power controller unit 60 and a driving device 101 are electrically connected. The inserting and pulling-out bolt 60b can threadedly engage with the driving device 101, and comprises: a thread part 81 formed to an external peripheral surface; a spanner engaging part 82 adjacent to the thread part 81; a nut engagement part 83 to which a nut 68 is engaged to an opposite side to the thread part 81 by sandwiching the spanner engaging part 82; a connecting part 84 that is arranged between the spanner engaging part and the nut engaging part 83 and penetrates the power control unit 60; and a hexagon wrench engaging part 85 that is formed to an upper end surface 83a of the nut engaging part 83, and is for inserting and pulling-out to/from the driving device 101.SELECTED DRAWING: Figure 10A

Description

  The present invention relates to a fastening holding member and a fastening structure of an integrated unit, and more particularly to a fastening holding member and a fastening structure of the integrated unit used in an integrated unit in which a control unit and a controlled device are electrically coupled.

  Conventionally, in a hybrid vehicle using an engine and an electric motor as a drive source, an electric vehicle using an electric motor as a drive source, and the like, an electric power control unit that controls the electric motor is disposed on the electric motor, thereby There is known an integrated unit in which the two are integrated (for example, Patent Document 1).

  Patent Document 1 describes that an inverter for controlling a motor driving device is attached from above the motor driving device and integrated by bolt fastening.

JP 2013-150472 A

  However, in the configuration described in Patent Document 1, since electrical coupling and mechanical coupling between the motor driving device and the inverter are performed by the same bolt, variations in the connectors themselves and the positional relationship between the connector and the motor driving device or the inverter are affected. Due to the variation, there is a risk that the connector may be damaged due to an excessive stress applied to the connector or a contact failure may occur.

  The present invention has been made in view of the above-described problems, and the object thereof is to be used for an integrated unit in which a control unit and a controlled device are electrically coupled, and it is possible to suppress connector breakage and contact failure. And a fastening structure of an integrated unit.

In order to achieve the above object, the invention described in claim 1
The control unit side connector (for example, the unit side generator connector 61 and the unit side motor connector 62 in the embodiment described later) and the controlled device side connector (for example, the case side connector 50 in the embodiment described later) are fitted to each other to thereby control the control unit. An integrated unit (for example, a hybrid vehicle drive unit in an embodiment to be described later) in which a (a power control unit 60 in an embodiment to be described later) and a controlled apparatus (for example, a drive device 101 in an embodiment to be described later) are electrically coupled. 100) a fastening holding member (for example, an insertion / extraction bolt 60b in an embodiment described later),
A threaded portion (for example, a threaded portion 81 in an embodiment described later) that can be screwed to the controlled device and has one of a forward screw and a reverse screw formed on the outer peripheral surface;
A first tool fitting portion (for example, a spanner fitting portion 82 in an embodiment described later) adjacent to the screw portion;
A nut threaded portion (for example, a nut threaded portion 83 in an embodiment described later) in which a nut (for example, a nut 68 in an embodiment described later) is screwed on the opposite side of the screw portion with the first tool fitting portion interposed therebetween; ,
A connecting portion (for example, a connecting portion 84 in an embodiment described later) provided between the first tool fitting portion and the nut screwing portion and penetrating the control unit;
A second tool fitting portion (for example, a hexagon wrench fitting in an embodiment to be described later) formed on an end surface of the nut screwing portion (for example, an upper end surface 83a in an embodiment to be described later) and inserted into and removed from the controlled device. Part 85).

The invention according to claim 2 is the invention according to claim 1,
In the nut screwing portion, the other of the forward screw and the reverse screw is formed on the outer peripheral surface.

The invention according to claim 3 is the invention according to claim 1 or 2,
The connecting portion is loosely fitted to the control unit so as to be relatively movable,
The distance at which the relative movement is possible is shorter than the screwing length of the screw portion.

The invention according to claim 4
The control unit side connector (for example, the unit side generator connector 61 and the unit side motor connector 62 in the embodiment described later) and the controlled device side connector (for example, the case side connector 50 in the embodiment described later) are fitted to each other to thereby control the control unit. An integrated unit (for example, a hybrid vehicle drive unit in an embodiment to be described later) in which a (a power control unit 60 in an embodiment to be described later) and a controlled apparatus (for example, a drive device 101 in an embodiment to be described later) are electrically coupled. 100) fastening structure,
The control unit and the controlled device are electrically coupled by a fastening holding member (for example, an insertion / extraction bolt 60b in an embodiment described later),
The fastening holding member is
A threaded portion (for example, a threaded portion 81 in an embodiment described later) that can be screwed to the controlled device and has one of a forward screw and a reverse screw formed on the outer peripheral surface;
A first tool fitting portion (for example, a spanner fitting portion 82 in an embodiment described later) adjacent to the screw portion;
A nut threaded portion (for example, a nut threaded portion 83 in an embodiment described later) in which a nut (for example, a nut 68 in an embodiment described later) is screwed on the opposite side of the screw portion with the first tool fitting portion interposed therebetween; ,
A connecting portion (for example, a connecting portion 84 in an embodiment described later) provided between the first tool fitting portion and the nut screwing portion and penetrating the control unit;
A second tool fitting portion (for example, a hexagon wrench fitting in an embodiment to be described later) formed on an end surface of the nut screwing portion (for example, an upper end surface 83a in an embodiment to be described later) and inserted into and removed from the controlled device. Part 85), and
The control unit and the controlled device are electrically coupled in a screwed state in which the screw portion is screwed to the controlled device.

The invention according to claim 5 is the invention according to claim 4,
In the nut screwing portion, the other of the forward screw and the reverse screw is formed on the outer peripheral surface.

Further, the invention according to claim 6 is the invention according to claim 4 or 5,
The fastening holding member is movable relative to the control unit in the axial direction in the screwed state,
The distance at which the relative movement is possible is shorter than the screwing length of the screw portion.

Further, the invention according to claim 7 is the invention according to any one of claims 4 to 6,
In a state where the fastening holding member is attached to the controlled device, access to the nut screwed into the nut screwing portion is restricted and access to the second tool fitting portion is allowed. A limiting member (for example, a first limiting member 91 in an embodiment described later) is provided.

The invention according to claim 8 is the invention according to any one of claims 4 to 7,
A fixing member for fixing the control unit and the controlled device is provided, and access to the second tool fitting portion is restricted in a fixed state where the fixing member fixes the control unit and the controlled device. A second restricting member (for example, a second restricting member 95 in an embodiment described later).

  According to invention of Claim 1 and 4, it fits in a 2nd tool fitting part, hold | maintaining a control unit between the 1st tool fitting part and the nut screwed together in a nut screwing part. The control unit and the controlled device can be electrically coupled by screwing the threaded portion of the fastening holding member to the controlled device with the second tool.

  According to the second and fifth aspects of the present invention, the nut threaded portion is formed with a screw different from the threaded portion, so that the threaded portion is covered by the second tool fitted into the second tool fitting portion. When screwing into the control device, it is possible to prevent the nut that comes into contact with the surface of the control unit from loosening.

  According to the third and sixth aspects of the invention, poor contact can be avoided by securing a certain length in the threaded portion in order to ensure electrical coupling. Also, if the distance that allows relative movement is long, it is necessary to lengthen the connector by the distance that allows relative movement. Therefore, the increase in the size of the connector can be prevented by making this distance shorter than the screwing length of the threaded portion. .

  According to the seventh aspect of the present invention, when removing the control unit from the controlled device, the control unit is originally removed from the controlled device while being held by the fastening holding member. Only the control unit can be prevented from being removed while the fastening holding member is screwed to the controlled device.

  According to the eighth aspect of the present invention, when the control unit is removed from the controlled device, the fastening member can be prevented from being removed in the wrong order when the fixing member is first removed.

It is a perspective view of the drive unit for hybrid vehicles as one embodiment of an integrated unit of the present invention. It is a block diagram of the drive unit for hybrid vehicles of FIG. It is sectional drawing which shows the inside of the drive device case of the drive unit for hybrid vehicles of FIG. FIG. 2 is a cross-sectional view of a main part showing the inside of a drive device case and the inside of a power control unit of the hybrid vehicle drive unit of FIG. 1. It is a disassembled perspective view of the drive unit for hybrid vehicles of FIG. It is a side view of a power control unit. It is a side view of a case side connector. It is a side view of a drive device case. It is a top view of a power control unit. It is a top view of a case side connector. It is a top view of a drive device case. It is sectional drawing which shows the power control unit of the drive unit for hybrid vehicles of FIG. It is the perspective view which looked at the power control unit of the drive unit for hybrid vehicles of FIG. 1 from the bottom face side. It is a disassembled perspective view of a nut and a bolt for insertion / extraction. It is a perspective view of the bolt for insertion / extraction which the nut screwed together. FIG. 2 is a plan view showing a state where a mount member is attached to a drive device case of the hybrid vehicle drive unit of FIG. 1. It is sectional drawing which shows the initial state of the assembly | attachment of a power control unit and a drive device. It is sectional drawing which shows the state with which the power control unit and the drive device were electrically couple | bonded. It is sectional drawing which shows the state with which the power control unit and the drive device were couple | bonded mechanically. It is a perspective view which shows the surroundings of the insertion bolt with which the 1st restriction member was provided. It is a disassembled perspective view of the drive unit for hybrid vehicles provided with the 2nd restriction member. It is the elements on larger scale which show the access prevention piece periphery.

  Hereinafter, a hybrid vehicle drive unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

<Drive unit for hybrid vehicle>
As shown in FIGS. 1 to 3, in the hybrid vehicle drive unit 100 according to the embodiment of the present invention, the generator 20 and the motor 30 are housed in a substantially cylindrical drive device case 40, and the engine 4. And a power control unit 60 that controls the generator 20 and the motor 30 are mounted on the drive device case 40. In FIG. 1, symbols Fr, Rr, L, R, U, and D indicate front, rear, left, right, upper, and lower, respectively, according to the direction viewed from the driver.

  As shown in FIG. 2 and FIG. 3, an input shaft 1, an intermediate shaft 2, and an output shaft 3 that are arranged in parallel are provided inside the drive device case 40, respectively. The inner peripheral shaft 2a is surrounded by the outer peripheral shaft 2b so as to be relatively rotatable. In the following description, the axial direction refers to a direction parallel to the rotation axis of the input shaft 1, the intermediate shaft 2, and the output shaft 3. The hybrid vehicle drive unit 100 is disposed in the engine room such that the axial direction is the vehicle width direction (left-right direction) of the vehicle, and the direction orthogonal to the axial direction is the front-rear direction of the vehicle.

  The input shaft 1 connected to the crankshaft 4a of the engine 4 is connected via a generator drive gear pair 5 to an inner peripheral shaft 2a provided with a generator 20 on its axis. The outer peripheral shaft 2b having the motor 30 on its axis is connected to the output shaft 3 via the motor driving force transmission gear pair 6, and the input shaft 1 and the output shaft 3 are connected to the engine driving force transmission gear pair 7. Connected through. The output shaft 3 and the differential device 8 are connected via a final gear pair 9, and the differential device 8 is connected to drive wheels 11 and 11 via a differential shaft 10. Further, the input shaft 1 is provided with a clutch 12 that connects or disconnects power transmission between the input shaft 1 and the output shaft 3 via the engine driving force transmission gear pair 7.

  The hybrid vehicle drive unit 100 configured as described above transmits the driving force of the motor 30 to the driving wheels 11 and 11 and travels the vehicle, and transmits the driving force of the engine 4 to the driving wheels 11 and 11. And a transmission path for driving the vehicle, and the two transmission paths are alternatively selected or used in combination.

  When using a transmission path for driving the vehicle by transmitting the driving force of the motor 30 to the drive wheels 11, 11, the engine 4 is driven with the clutch 12 released. The engine driving force input from the input shaft 1 to the inner peripheral shaft 2a of the intermediate shaft 2 via the generator drive gear pair 5 rotates the inner peripheral shaft 2a and rotates the generator 20 fixed to the inner peripheral shaft 2a as a unit. As a result, the generator 20 generates power. The motor 30 connected on the outer peripheral shaft 2b surrounding the inner peripheral shaft 2a in a relatively rotatable manner receives the electric power generated by the generator 20 to rotate the outer peripheral shaft 2b, and via the motor driving force transmission gear pair 6 The driving force is transmitted to the output shaft 3. The driving force transmitted to the output shaft 3 is transmitted to the drive wheels 11 and 11 via the final gear pair 9, the differential device 8 and the differential shaft 10. Thereby, it is possible to perform so-called series operation in which all the driving force of the engine 4 is changed to electricity by the generator 20.

  On the other hand, when using a transmission path for transmitting the driving force of the engine 4 to the drive wheels 11 and 11 to drive the vehicle, the engine 4 is driven with the clutch 12 connected. The engine driving force input from the input shaft 1 is transmitted to the output shaft 3 via the engine driving force transmission gear pair 7, and is applied to the drive wheels 11 and 11 via the final gear pair 9, the differential device 8, and the differential shaft 10. Communicated. At this time, since the input shaft 1 and the inner peripheral shaft 2a are always connected via the generator drive gear pair 5, so-called parallel operation is performed by generating power with the generator 20 and rotating the motor 30 with the generated power. Is also possible. In addition, by performing zero torque control on the generator 20 and the motor 30, it is possible to minimize the drag loss and run only with the driving force of the engine 4.

  Next, with reference to FIG. 3, the arrangement of the generator 20 and the motor 30 in the drive device case 40 of the present embodiment will be specifically described.

  The drive device case 40 of the present embodiment is configured to include first and second cases 42 and 43 that are sequentially arranged from the engine 4 side, and an input shaft 1, an intermediate shaft 2, and an output shaft 3 are contained therein. They are arranged parallel to each other. As described above, the intermediate shaft 2 includes the inner peripheral shaft 2a and the outer peripheral shaft 2b. The motor 30 is connected to the outer peripheral shaft 2b, and the connecting shaft 2c is splined to the inner peripheral shaft 2a. The generator 20 is connected via

  That is, the generator 20 and the motor 30 are accommodated in the drive device case 40 so as to be aligned on the same rotation axis O. The generator housing portion GS for housing the generator 20 and the motor housing portion MS for housing the motor 30 are partitioned by a partition wall 44. The partition wall 44 rotates the outer peripheral shaft 2b and the connection shaft 2c via bearings 2d and 2e. Supports freely.

  The generator 20 is composed of a rotor 21 fixed to the connection shaft 2c and a stator 22 disposed opposite to the rotor 21. The stator 22 has three phases (U phase, V phase, W phase). A coil 23 is wound. The coil 23 includes a coil winding portion 23 a wound around the tooth portion of the stator 22 and a coil transition portion 23 b that connects the coil winding portions 23 a. The coil transition portion 23 b is connected to the stator 22 from the stator 22. Projects in the axial direction.

  The motor 30 includes a rotor 31 fixed to the outer peripheral shaft 2b and a stator 32 disposed to face the rotor 31. The stator 32 includes three phases (U phase, V phase, W phase). A coil 33 is wound. The coil 33 includes a coil winding portion 33 a wound around a tooth portion of the stator 32 and a coil transition portion 33 b that connects the coil winding portions 33 a. The coil transition portion 33 b is connected to the stator 32 from the stator 32. Projects in the axial direction.

  A generator resolver 24 for detecting a rotation angle of the generator 20 between the generator 20 and the motor 30 in the axial direction on the inner diameter side of the coil transition portion 23b of the generator 20 and the coil transition portion 33b of the motor 30; A motor resolver 34 that detects the rotation angle of the motor 30 is disposed.

  The generator resolver 24 includes a resolver rotor 24a fixed to the connection shaft 2c, and a resolver stator 24b disposed opposite to the resolver rotor 24a. The motor resolver 34 includes a resolver rotor 34a fixed to the outer peripheral shaft 2b. And a resolver rotor 34a and a resolver stator 34b disposed to face each other. Resolver stators 24b and 34b of generator resolver 24 and motor resolver 34 are both supported by partition wall 44 described above. In this manner, not only can the generator resolver 24 and the motor resolver 34 be arranged using the dead space existing on the inner diameter side of the coil crossover portions 23b and 33b, but the partition wall 44 can be disposed in the generator resolver 24 and the motor resolver 34. It becomes possible to share it as a supporting wall. Coils (not shown) drawn from the resolver stators 24 b and 34 b are connected to a resolver connector 35 disposed on the front surface of the drive device case 40, and the resolver connector 35 and the power control unit 60 are connected via a harness 37. ing.

  As shown in FIG. 3 and FIG. 4, the coils 23 of each phase (U phase, V phase, W phase) of the generator 20 are connected at one end, and the other ends are drawn out from the stator 22 as coil terminals 23 c, It is connected to the case-side generator connector 51 in the driving device case 40. Further, one end of the coil 33 of each phase of the motor 30 is connected, and the other end is pulled out from the stator 32 as a coil terminal 33 c and connected to the case-side motor connector 52 in the driving device case 40.

  The case-side generator connector 51 and the case-side motor connector 52 are arranged so as to be aligned along the direction orthogonal to the rotation axis O between the center P1 of the generator 20 and the center P2 of the motor 30 in the axial direction. The case-side generator connector 51 and the case-side motor connector 52 of the present embodiment are connected via a connector holding member 53 to constitute an integrated case-side connector 50, and the connector holding member 53. It is fixed to the drive unit case 40 via

  More specifically, the case-side generator connector 51 and the case-side motor connector 52 of the present embodiment are, as shown in FIGS. 52 a and coil connecting portions 51 b and 52 b protruding from the lower surface of the connector holding member 53. Three case side connection conductors 54 and 55 corresponding to the U phase, the V phase, and the W phase are accommodated inside the connector portions 51a and 52a and the coil connection portions 51b and 52b. The connector portions 51a and 52a have a long cylindrical shape, and three-phase connector terminals 51c and 52c formed at one end of the case-side connection conductors 54 and 55 are disposed therein. The coil connection portions 51b and 52b have a long cylindrical shape, and the coil connection terminals 51d and 52d for three phases formed at the other ends of the case side connection conductors 54 and 55 are arranged on the outer surface portions thereof. ing.

  The connector holding member 53 is formed with through holes 53b, 53c, 53d, 53e, and fastening holes 42c, 42d, 42e formed in the drive device case 40 through these through holes 53b, 53c, 53d, 53e. , 42f are fastened with bolts 53f, 53g, 53h, 53i to form bolt fastening points T1, T2, T3, T4 between the connector holding member 53 and the drive device case 40.

  In the case-side generator connector 51 and the case-side motor connector 52 of this embodiment configured as described above, the connector holding member 53 is along the upper surface of the drive device case 40, and the coil connection portions 51b and 52b are those of the drive device case 40. It is attached to the drive device case 40 so as to be fitted into the connector holes 42 a and 42 b formed on the upper surface, and constitutes a part of the drive device 101. As a result, as shown in FIG. 4, the case-side generator connector 51 and the case-side motor connector 52 are arranged along a tangent line Q passing through the upper ends of the generator 20 and the motor 30 when viewed from the axial direction. As shown in FIG. 11, the case-side generator connector 51 and the case-side motor connector 52 are arranged in the front-rear direction so as to sandwich the rotation axis O of the rotor 21 of the generator 20 and the rotor 31 of the motor 30 when viewed from the vertical direction. Is done. In the drive device case 40, the coil terminals 23 c of each phase of the generator 20 are connected to the coil connection terminals 51 d of the case side generator connector 51, and the coil terminals 33 c of each phase of the motor 30 are connected to the case side motor connector 52. To the coil connection terminal 52d (see FIG. 4).

  As shown in FIG. 8, the power control unit 60 of the present embodiment includes an inverter 64, a control unit 65 (ECU) that controls the inverter 64, a current sensor (not shown), and the like housed in a substantially box-shaped unit case 63. Has been. The inverter 64 is connected between a battery disposed outside the engine room and the generator 20, connected between a generator inverter for converting AC voltage and DC voltage, the battery and the motor 30, and DC The inverter for motors which converts a voltage and an alternating voltage is included.

  As shown in FIGS. 4, 8, and 9, a unit-side generator connector 61 and a unit-side motor connector 62 are provided on the bottom surface of the power control unit 60, and these unit-side generator connector 61 and unit-side motor are provided. By electrically connecting the connector 62 to the case-side generator connector 51 and the case-side motor connector 52 described above, the generator 20 and the motor 30 can be controlled by the power control unit 60.

  More specifically, the unit-side generator connector 61 and the unit-side motor connector 62 are oval fitting holes 61a and 62a that are externally fitted to the connector portions 51a and 52a of the case-side generator connector 51 and the case-side motor connector 52. The connector portions 61b and 62b are provided so as to project into the connector portions 51a and 52a of the case-side generator connector 51 and the case-side motor connector 52, and the inverter connection portions 61e and 62e are located in the unit case 63. . Three unit side connection conductors 66 and 67 corresponding to the U phase, the V phase, and the W phase are accommodated inside the connector portions 61b and 62b and the inverter connection portions 61e and 62e. The connector portions 61b and 62b have three-phase connector terminals 61c formed at one end of the unit side connection conductors 66 and 67 that are in contact with the connector terminals 51c and 52c of the case side generator connector 51 and the case side motor connector 52, respectively. 62c is arranged, and the inverter connection portions 61e and 62e are arranged with three-phase inverter connection terminals 61d and 62d formed at the other ends of the unit side connection conductors 66 and 67, respectively.

  As shown in FIGS. 1, 4, 5, and 11, the power control unit 60 is electrically connected to a connector holding member 53 that holds the case-side generator connector 51 and the case-side motor connector 52 attached to the drive device case 40. It is fixed at a connection fixing point K5. Specifically, the power control unit 60b is fastened to the fastening hole 53a formed in the connector holding member 53 through the through hole 60a formed in the power control unit 60 (see FIG. 7A). A fixing point K5 for electrical connection between the connector 60 and the connector holding member 53 is formed.

  As shown in FIGS. 10A and 10B, the insertion / extraction bolt 60b has a threaded portion 81 in which a forward thread is formed on the outer peripheral surface of the lower end portion, and a hexagonal shape in which a spanner is fitted adjacent to the upper portion of the threaded portion 81. Between the spanner fitting portion 82, the nut screwing portion 83 where the nut 68 is screwed on the opposite side of the screw portion 81 across the spanner fitting portion 82, and between the spanner fitting portion 82 and the nut screwing portion 83. A columnar connecting portion 84 provided, and a hexagon wrench fitting portion 85 that is formed on the upper end surface 83a of the nut screwing portion 83 and that is inserted into and removed from the driving device 101 are provided. On the outer peripheral surface of the nut screwing portion 83, a reverse screw is formed in which a screw is cut in a direction opposite to the screw portion 81.

  As shown in FIG. 9, an annular recess 63e is provided on the bottom surface around the through hole 60a of the power control unit 60 through which the insertion / removal bolt 60b passes, and the connector holding member 53 to which the insertion / removal bolt 60b is fastened. As shown in FIG. 5, a cylindrical convex portion 53j that is accommodated in an annular concave portion 63e of the power control unit 60 is provided around the fastening hole 53a.

  The insertion / extraction bolt 60 b is configured such that the screw portion 81 is inserted into the fastening hole 53 a of the connector holding member 53 in a state where the power control unit 60 is held between the nut 68 and the spanner fitting portion 82 screwed to the nut screwing portion 83. By being fastened, the lower surface of the spanner fitting portion 82 comes into contact with the cylindrical convex portion 53j of the connector holding member 53. The insertion / extraction bolt 60b ensures electrical connection between the connector terminals 51c and 52c of the case-side generator connector 51 and the case-side motor connector 52 and the connector terminals 61c and 62c of the unit-side generator connector 61 and the unit-side motor connector 62. As long as the insertion / extraction bolt 60b is fastened to the fastening hole 53a, the connector terminals 51c and 52c of the case-side generator connector 51 and the case-side motor connector 52, the unit-side generator connector 61, and the unit-side motor connector The connector terminals 61c and 62c of 62 are electrically connected to each other.

  The connecting portion 84 has a larger diameter than the through hole 60a and is loosely fitted in the through hole 60a, and is longer than the wall thickness of the power control unit 60 in which the through hole 60a is formed. The relative movement between the working bolt 60b and the power control unit 60 is possible. In addition, the distance in which the relative movement is possible is shorter than the screwing length at which the screw portion 81 is screwed into the fastening hole 53 a of the connector holding member 53.

  Further, as shown in FIGS. 5, 9, and 11, the power control unit 60 is fixed to the drive device case 40 by bolt fastening of at least four points. Specifically, the bolts 60g, 60h, 60i are connected to the fastening holes 42g, 42h, 42i, 42j formed in the drive device case 40 through the through holes 60c, 60d, 60e, 60f formed in the power control unit 60. , 60j are fastened to form bolt fastening points T5, T6, T7, T8 between the power control unit 60 and the drive device case 40. The bolts 60g, 60h, 60i, 60j have a function of guaranteeing mechanical coupling between the power control unit 60 and the drive device case 40, and the bolts 60g, 60h, 60i, 60j are fastening holes 42g, 42h, 42i. , 42j, the power control unit 60 and the drive unit case 40 are mechanically coupled to each other.

  That is, the power control unit 60 and the driving device 101 are held in a coupled state electrically coupled by the insertion / extraction bolt 60b, and the bolts 60g, 60h, 60i having the same fastening direction as the fastening direction of the insertion / extraction bolt 60b. , 60j are held in a mechanically coupled state.

  The boss part in which the through holes 60c, 60d, 60e, and 60f are formed is configured to protrude slightly below the bottom surface of the power control unit 60, and only the boss part is in contact with the drive device case 40. The four bolt fastening points T5, T6, T7, and T8 are arranged so as to surround the case-side generator connector 51 and the case-side motor connector 52 in a rectangular shape. By doing so, the rigidity of the drive device case 40 is enhanced by the integration of the power control unit 60 and the drive device case 40 by bolt fastening, so that the vibration of the drive device case 40 can be further reduced. When the bolts 60g, 60h, 60i, and 60j are fastened, the power control unit 60 is held in a floating state between the nut 68 and the spanner fitting portion 82 (see FIG. 12C).

  As shown in FIGS. 5 to 7C, a power control unit mounting portion 42 k is formed on the upper surface of the drive device case 40. In the power control unit 60, only the boss portion in which the through holes 60c, 60d, 60e, and 60f are formed abuts on the power control unit mounting portion 42k, and is mounted on the power control unit mounting portion 42k through a space. In this state, the drive device case 40 and the connector holding member 53 are fixed by bolt fastening.

  As shown in FIG. 9, guide pin fixing holes 63a and 63b are formed on the bottom surface of the power control unit 60 in the vicinity of the through hole 60c and in the vicinity of the through hole 60f. The guide pins 63c and 63d are screwed in from the bottom side (see FIG. 6A). The guide pins 63c and 63d protruding from the bottom surface of the power control unit 60 are inserted into the guide holes 42m and 42n of the drive device case 40 when the power control unit 60 is mounted on the upper surface of the drive device case 40 (FIG. 5). reference). The guide pins 63c and 63d and the guide holes 42m and 42n have a function of regulating the relative position between the power control unit 60 and the drive device case 40 and guiding the power control unit 60.

  Thus, in the drive device 101 to which the power control unit 60 is attached, the drive device case 40 is fixed to the vehicle body frame 80 via the mount member 70 as shown in FIG. The mount member 70 includes a vehicle-side fixing member 71 that is fixed to the vehicle body frame 80, a case-side fixing member 72 that is fixed to the upper outer end side of the drive device case 40, and the vehicle-side fixing member 71 and the case-side fixing member 72. The vehicle side fixing member 71 is fixed to the vehicle body frame 80 by fastening bolts 71a, and the case side fixing member 72 is bolts 72a, 72b, 72c. Is fixed to the drive device case 40 by fastening.

  A bolt 71a is fastened to a fastening hole (not shown) formed in the vehicle body frame 80 via a through hole (not shown) formed in the vehicle side fixing member 71, whereby the mount member 70 and the vehicle body frame 80 are fixed. A fixing point K1 is configured, and through fastening holes 43a, 43b, and 43c (see FIGS. 1 and 7C) formed in the drive device case 40 through through holes (not shown) formed in the case-side fixing member 72. By fastening the bolts 72a, 72b, 72c, fixing points K2, K3, K4 between the mount member 70 and the drive device case 40 are configured. The drive device case 40 is also fixed to the vehicle body frame 80 via the mount member 70 in other portions, but description of the other portions is omitted here.

<Assembly method>
Next, a method for assembling the power control unit 60 and the driving device 101 will be described with reference to FIGS. 12A to 12C.

  In assembly, first, the insertion / extraction bolt 60b is inserted into the through hole 60a from the annular recess 63e formed on the bottom surface of the power control unit 60. Subsequently, in a state where the rotation is restricted by a spanner (not shown) fitted to the spanner fitting portion 82, the nut 68 protrudes from the through hole 60a by turning the nut 68 in the reverse direction (direction in which the reverse screw is tightened). A nut 68 is screwed into the screwing portion 83. In this state, the insertion / extraction bolt 60b is loosely fitted to the power control unit 60 between the nut 68 and the spanner fitting portion 82. As described above, the insertion / extraction bolt 60b and the power control unit 60 Relative movement is possible.

  Subsequently, the power control unit 60 is assembled to the drive device case 40 while aligning so that the guide pins 63 c and 63 d extending from the bottom surface of the power control unit 60 are inserted into the guide holes 42 m and 42 n of the drive device case 40. When the screw portion 81 reaches the cylindrical convex portion 53j, a hexagon wrench (not shown) is fitted to the hexagon wrench fitting portion 85 of the insertion / extraction bolt 60b and turned in the forward direction (direction in which the forward screw is tightened). 12A, the screw portion 81 is screwed into the fastening hole 53a of the connector holding member 53, and the connector portions 61b and 62b of the unit-side generator connector 61 and the unit-side motor connector 62 are connected to the case-side generator connector 51 and the case-side. The connector portions 51a and 52a of the motor connector 52 are fitted, and the connector terminals 61c and 62c and the connector terminals 51c and 52c gradually come into contact with each other.

  While the hexagon wrench is being turned, the lower surface of the nut 68 is in sliding contact with the surface 63f of the unit case 63, but since the reverse screw is formed on the nut screwing portion 83, the hexagon wrench is turned in the forward direction. However, the nut 68 does not loosen, but rather acts in the direction in which the nut 68 is tightened. As shown in FIG. 12B, the lower surface of the spanner fitting portion 82 contacts the columnar convex portion 53j of the connector holding member 53, so that the connector terminals 61c and 62c and the connector terminals 51c and 52c are reliably electrically coupled. Is done. That is, the distance H1 between the power control unit 60 and the drive device 101 shown in FIG. 12B is a distance that ensures electrical coupling.

  Subsequently, the bolts 60g, 60h, 60i, 60j are fastened to the fastening holes 42g, 42h, 42i, 42j formed in the drive device case 40 through the through holes 60c, 60d, 60e, 60f formed in the power control unit 60. As a result, the power control unit 60 moves downward with respect to the insertion / extraction bolt 60b, and the lower surface of the boss part in which the through holes 60c, 60d, 60e, 60f are formed comes into contact with the drive device case 40. As a result, the power control unit 60 and the drive device case 40 are mechanically coupled to each other. That is, by fastening the bolts 60g, 60h, 60i, and 60j from the state shown in FIG. 12B, the distance H1 between the power control unit 60 and the drive device 101 gradually becomes the distance H2 shown in FIG. Bonding is guaranteed.

  Note that the distance that the relative movement between the insertion / extraction bolt 60b and the power control unit 60 is longer than the movement distance of the power control unit 60 by fastening the bolts 60g, 60h, 60i, and 60j. The distance is set so as not to disturb the mechanical coupling. Along with this relative movement, the connector portions 61b and 62b of the unit-side generator connector 61 and the unit-side motor connector 62 and the connector portions 51a and 52a of the case-side generator connector 51 and the case-side motor connector 52 are fitted more deeply. The connector terminals 51c and 52c penetrate deep into the connector terminals 61c and 62c, and the electrical connection state is maintained.

<How to remove>
Further, when the power control unit 60 is removed from the drive device 101, the procedure is reverse to the assembling method. That is, after removing the bolts 60g, 60h, 60i, 60j that mechanically connect the power control unit 60 and the drive device case 40, the connector terminals 51c, 52c of the case-side generator connector 51 and the case-side motor connector 52; The power control unit 60 is driven by removing the insertion / removal bolt 60b, which guarantees the electrical connection between the unit-side generator connector 61 and the connector terminals 61c of the unit-side motor connector 62, from the fastening hole 53a of the connector holding member 53. It becomes possible to remove from 101. Further, the insertion / extraction bolt 60b can be separated from the power control unit 60 by removing the nut 68 after being removed from the fastening hole 53a of the connector holding member 53 by a hexagon wrench fitted to the hexagon wrench fitting portion 85.

<Incorrect operation prevention mechanism>
Here, a description will be given of an erroneous operation preventing mechanism that can be additionally used so that the assembly procedure is not mistaken when the power control unit 60 is detached from the drive device 101.

  As described above, the insertion / extraction bolt 60b is removed from the fastening hole 53a of the connector holding member 53 by the hexagon wrench fitted to the hexagon wrench fitting portion 85, and then removed from the power control unit 60 by removing the nut 68. First, the first limiting member that prevents the erroneous operation of this procedure will be described.

  As shown in FIG. 13, the first restricting member 91 is a semi-cylindrical cap that partially covers the outer periphery of the nut 68 attached to the nut screwing portion 83 of the insertion / extraction bolt 60b, and defines the through hole 92. From both ends of the inner peripheral wall portion 93, access preventing projections 94 are extended toward the inner diameter side with the insertion / extraction bolt 60b interposed therebetween. Although the space between the access prevention protrusions 94 is wider than the hexagon wrench fitting portion 85, it is narrower than the width of the nut 68, and the hexagon wrench is fitted into the hexagon wrench fitting portion 85 through the through hole 92. Although they can be combined, a spanner and a wrench cannot be fitted to the nut 68. As described above, in a state where the insertion / extraction bolt 60b is attached to the connector holding member 53 of the drive device 101, the first restriction member 91 restricts access to the nut 68 screwed into the nut screwing portion 83, and By allowing access to the hexagon wrench fitting portion 85, the nut 68 is removed before the insertion / extraction bolt 60 b is removed from the fastening hole 53 a of the connector holding member 53 by the hexagon wrench fitted to the hexagon wrench fitting portion 85. It is prevented from being removed from the insertion / extraction bolt 60b.

Next, the second restriction member 95 will be described.
As described above, when removing the power control unit 60 from the drive device 101, the bolts 60g, 60h, 60i, and 60j are removed, and then the insertion / removal bolt 60b is removed. Used to prevent erroneous operation.

  As shown in FIGS. 14 and 15, the second limiting member 95 includes a thin plate-like front plate 96, rear plate 97, and side plate 98. The front plate 96 is formed with a through hole 60e of the power control unit 60 through which the bolt 60i penetrates at one end and a through hole 96a communicating with the fastening hole 42i of the drive device case 40, and the power control unit through which the bolt 60g penetrates at the other end. A through hole 96 b that communicates with the 60 through holes 60 c and the fastening holes 42 g of the drive device case 40 is formed. The rear plate 97 is formed with a through hole 60f of the power control unit 60 through which the bolt 60j penetrates at one end and a through hole 97a communicating with the fastening hole 42j of the drive device case 40, and a power control unit through which the bolt 60h penetrates at the other end. 60 through holes 60d and the through holes 97b communicating with the fastening holes 42h of the drive device case 40 are formed.

  The side plate 98 is formed with a through hole 60c of the power control unit 60 through which the bolt 60g penetrates at one end and a through hole 98a communicating with the fastening hole 42g of the drive device case 40, and the power control unit through which the bolt 60h penetrates at the other end. A through hole 98 b is formed which communicates with the 60 through holes 60 d and the fastening holes 42 h of the drive device case 40. An extension portion 98c extends integrally upward in the vertical direction at a substantially central portion of the side plate 98, and an access prevention piece 98d that covers the insertion bolt 60b and the nut 68 from above is provided at the tip of the extension portion 98c. .

  The second restricting member 95 is configured such that the front plate 96, the rear plate 97, and the side plate 98 are bolts 60g and 60h in a state in which a part of the front plate 96 and the rear plate 97 is superimposed on the side plate 98. , 60i, 60j. Therefore, since the side plate 98 cannot be removed unless the front plate 96 and the rear plate 97 are removed, the access prevention piece 98d is inserted / extracted only after all the bolts 60g, 60h, 60i, 60j are removed. Since 60b and the nut 68 are covered, neither the nut 68 nor the hexagon wrench fitting portion 85 can be accessed. Thus, in the fixed state in which the bolts 60g, 60h, 60i, and 60j fix the power control unit 60 and the drive device 101, the second restricting member 95 restricts access to the hexagon wrench fitting portion 85. It is possible to prevent the insertion / extraction bolt 60b from being removed prior to 60g, 60h, 60i, and 60j.

  The access preventing piece 98d may be configured to cover the first restricting member 91. In this case, both erroneous operations can be prevented.

  As described above, according to the present embodiment, the spanner fitting portion 82 and the nut screwing portion 83 are used by using the insertion / extraction bolt 60b different from the bolts 60g, 60h, 60i, 60j that guarantee the mechanical coupling. While holding the power control unit 60 between the nut 68 to be screwed, the screw portion 81 of the bolt 60b for insertion / extraction is screwed to the driving device 101 by the hexagon wrench fitted to the hexagon wrench fitting portion 85, The power control unit 60 and the drive device 101 can be electrically coupled.

  Further, the nut screwing portion 83 is formed with a reverse screw different from the screw portion 81 in which the forward screw is formed. Therefore, the screw portion 81 is connected to the driving device 101 by a hexagon wrench fitted to the hexagon wrench fitting portion 85. It is possible to prevent the nut 68 in contact with the power control unit 60 from being loosened when screwing into the power control unit 60.

  The connecting portion 84 of the insertion / extraction bolt 60b is loosely fitted to the power control unit 60 so as to be movable relative to the power control unit 60, and the movable distance of the power control unit 60 is shorter than the screwing length of the screw portion 81. . Therefore, poor contact can be avoided by securing a certain length to the threaded portion 81 that is screwed to ensure electrical coupling. Further, if the distance that allows relative movement is long, it is necessary to lengthen the unit-side generator connector 61, the unit-side motor connector 62, and the case-side connector 50 by the distance that allows relative movement. The size of the unit-side generator connector 61, the unit-side motor connector 62, and the case-side connector 50 can be prevented from being shorter than the screwing length.

The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.
For example, in the above-described embodiment, the generator 20 and the motor 30 are mounted as the integrated unit on the driving device 101 in which the generator 20 and the motor 30 are accommodated in the driving device case 40, the engine 4, and the driving device case 40 that accommodates the generator 20 and the motor 30. Although the hybrid vehicle drive unit 100 including the power control unit 60 that controls the generator 20 and the motor 30 is illustrated, the present invention is not limited thereto, and the integrated unit is configured separately from the engine, or The vehicle drive device which is not provided with the engine may be sufficient.

In the above embodiment, the drive device 101 including the generator 20 and the motor 30 is illustrated as the controlled device. However, it is not always necessary to include both, and a rotary electric machine has only one function. As long as it is, it may have both functions.
Furthermore, the integrated unit is not limited to a vehicle, and may be used for other transportation equipment.
In the above embodiment, the screw portion 81 is a forward screw and the nut screwing portion 83 is a reverse screw. However, the screw portion may be a reverse screw and the nut screwing portion 83 may be a forward screw.
Moreover, although the spanner was illustrated as a 1st tool in the said embodiment, you may use not only this but another tool.
Moreover, in the said embodiment, although the lower surface of the spanner fitting part 82 contact | abutted with the cylindrical convex part 53j of the connector holding member 53, it comprised so that electrical coupling | bonding was ensured. Apart from the fitting part 82, it may have an abutting part in contact with the cylindrical convex part 53j.
Moreover, although the hexagon wrench was illustrated as a 2nd tool in the said embodiment, you may use not only this but another tool.

50 Case side connector (Controlled device side connector)
60 Power control unit (control unit)
60b Bolt for insertion / extraction (fastening holding member)
61 Unit side generator connector (control unit side connector)
62 Unit side motor connector (control unit side connector)
68 Nut 81 Screw part 82 Spanner fitting part (first tool fitting part)
83 Nut threaded portion 83a Upper end surface (end surface)
84 connecting part 85 hexagon wrench fitting part (second tool fitting part)
91 First restriction member 95 Second restriction member 100 Hybrid vehicle drive unit (integrated unit)
101 Drive device (controlled device)

Claims (8)

A fastening and holding member used in an integrated unit in which the control unit and the controlled device are electrically coupled by fitting the control unit side connector and the controlled device side connector,
A threaded portion that can be screwed to the controlled device and has one of a forward screw and a reverse screw formed on the outer peripheral surface;
A first tool fitting portion adjacent to the screw portion;
A nut screwing portion in which a nut is screwed to the opposite side of the screw portion across the first tool fitting portion;
A connecting portion provided between the first tool fitting portion and the nut screwing portion and penetrating the control unit;
A fastening holding member, comprising: a second tool fitting portion that is formed on an end surface of the nut screwing portion and is inserted into and removed from the controlled device. The fastening holding member according to claim 1,
A fastening and holding member in which the other of the forward screw and the reverse screw is formed on an outer peripheral surface of the nut screwing portion. The fastening holding member according to claim 1 or 2,
The connecting portion is loosely fitted to the control unit so as to be relatively movable,
The distance which can be relatively moved is a fastening holding member shorter than the screwing length of the screw part. An integrated unit fastening structure in which the control unit and the controlled device are electrically coupled by fitting the control unit side connector and the controlled device side connector,
The control unit and the controlled device are electrically coupled by a fastening holding member,
The fastening holding member is
A threaded portion that can be screwed to the controlled device and has one of a forward screw and a reverse screw formed on the outer peripheral surface;
A first tool fitting portion adjacent to the screw portion;
A nut screwing portion in which a nut is screwed to the opposite side of the screw portion across the first tool fitting portion;
A connecting portion provided between the first tool fitting portion and the nut screwing portion and penetrating the control unit;
A second tool fitting portion that is formed on an end surface of the nut screwing portion and is inserted into and removed from the controlled device;
An integrated unit fastening structure in which the control unit and the controlled device are electrically coupled in a screwed state where the threaded portion is screwed into the controlled device. The fastening structure of an integrated unit according to claim 4,
An integrated unit fastening structure, wherein the nut threaded portion is formed with the other of the forward screw and the reverse screw on the outer peripheral surface thereof. A fastening structure for an integrated unit according to claim 4 or 5,
The fastening holding member is movable relative to the control unit in the axial direction in the screwed state,
The distance of the relative movement is shorter than the screwing length of the threaded portion, and the integrated unit fastening structure. It is the fastening structure of the integrated unit as described in any one of Claims 4-6,
In a state where the fastening holding member is attached to the controlled device, access to the nut screwed into the nut screwing portion is restricted and access to the second tool fitting portion is allowed. An integrated unit fastening structure including a limiting member. It is the fastening structure of the integrated unit as described in any one of Claims 4-7,
A fixing member for fixing the control unit and the controlled device is provided, and access to the second tool fitting portion is restricted in a fixed state where the fixing member fixes the control unit and the controlled device. An integrated unit fastening structure comprising a second restricting member.

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